Hi Ghorthalon,
Indeed I am having some problems with my Sapi 5. Lots of games use it, But NVDA for example isn't able to use it. I searched for a long time for a solution but wasn't able to find one. I have only Microsoft Anna and for Example Aprones games, Audioquake or entombed are having no problems. But when I try to use Sapi5 with NVDA, I get an error. I also tried reinstalling it, but was confused by the different modules of sapi5 that microsoft provides.
I also checked the TTS-settings of windows, but there wasn't so much to do. Anna is chosen as my standart voice.
Do you maybe have an idea what to do?